Body Fat Calculator

Choose Male or Female. This determines the formula used and whether the hip measurement is required for the calculation.

Use a flexible tape measure. Measure your waist at the navel, neck below the larynx, and hip at the widest point if female.

Type in your current weight in kilograms. This is used to calculate your exact fat mass and lean body mass values.

Press the Calculate Now button. Your body fat percentage, category, and mass breakdown appear instantly in the result panel.

Body fat percentage is the fraction of your total body mass that is made up of fat. It gives a much clearer picture of health than weight alone.

The Navy developed a simple tape measure formula to quickly estimate body fat for military personnel without expensive water tanks or scanners.

Fat mass is the weight of all the fat in your body. Lean mass is everything else including muscle, bones, organs, and water weight combined.

The human body needs a minimum amount of fat to function properly. For men this is about two to five percent and for women about ten to thirteen percent.

Competitive athletes carry less fat for better speed and endurance. Male athletes often sit between six and thirteen percent while females range from fourteen to twenty.

People who work out regularly but are not elite athletes usually fall in the fitness zone. Men range from fourteen to seventeen percent and women twenty one to twenty four.

The general population sits in the average zone. Men typically carry eighteen to twenty four percent fat while women carry twenty five to thirty one percent.

Carrying too much fat increases the risk of heart disease, diabetes, and joint problems. Levels above twenty five percent for men and thirty two percent for women are risky.

Keep the tape snug but not tight against the skin. Measure at the exact spots the tool asks for to get the most accurate estimate from the formula.

The Navy method estimates fat based on circumferences. It is very accurate for most people but may vary for extreme body types or very muscular individuals.

Muscle is denser than fat. A muscular person might weigh the same as an unfit person but have a much lower body fat percentage and smaller waist size.

Your measurements stay on your own device. The tool does the math in your browser and never sends your health data to a distant server.

Uses the exact mathematical formula trusted by military organizations worldwide to estimate body fat quickly and reliably.

Just grab a simple tape measure. You do not need expensive skinfold calipers or a gym membership to check your body composition.

The tool breaks down your total weight into fat mass and lean mass so you can see exactly how many kilograms of fat you carry.

Your result comes with an instant category rating from Essential Fat to Obese so you immediately know where you stand health wise.

Check your body fat from your phone or tablet. The design fits well on any small screen so you can use it at the gym or at home.

You do not need to pay money or make an account. The Ease Tools app is open for anyone to use at any time completely free.

A dedicated button lets you grab your full result text with one tap. You can then paste it into your fitness journal or share with your coach.

The female hip measurement field appears only when needed. The form adapts to your selection so the screen stays clean and simple.

We do not keep your health measurements. The tool does all the work locally on your computer to keep your private data completely safe.